如何从 JSON 对象中获取值？ [复制]

Question

我有带有日期值的 JSONObject。每个日期或日期范围都有 ID。我使用此代码创建 JSON：

<script>
    <cfset dateStruct = structNew() />
    <cfoutput query="qryOne">
        <cfset dateStruct[userID] = arrayNew(1) />
        <cfloop from="#PickDateTime#" to="#DropDateTime#" index="i" step="#CreateTimeSpan(1,0,0,0)#">
            <cfset arrayAppend(dateStruct[userID],"#dateformat(i,'mmddyyyy')#")/>
        </cfloop>
    </cfoutput>

    var jsonString =  '<cfoutput>#SerializeJSON(dateStruct)#</cfoutput>';
    var JSONObject = JSON.parse(jsonString);

    function giveClass(){
        for(var key in JSONObject){
            res = document.getElementById(JSONObject[key]);
            res.className = 'booked'
        }
    }
</script>

我在 jsonString 上做了警报，看起来像这样：

{"49":["01082016","01092016"],"48":["03012016","03022016","03032016","03042016","03052016","03062016","03072016","03082016","03092016","03102016","03112016","03122016","03132016","03142016","03152016","03162016","03172016","03182016","03192016","03202016","03212016","03222016","03232016","03242016","03252016","03262016","03272016","03282016","03292016","03302016","03312016"],"44":["01122016"],"47":["02062016"],"46":["02112016","02122016","02132016","02142016","02152016"],"35":["01132016"],"36":["01212016"],"39":["01162016"],"37":["01262016"],"38":["01192016"],"43":["01312016"],"42":["02022016","02032016"],"41":["01142016"],"40":["01172016","01182016","01192016"],"51":["01282016"],"52":["02252016","02262016"],"50":["01282016"]}

每个日期都存储在唯一的 ID 下。在我上面的函数中，我想将 className = 'booked' 分配给每个 ID，而不是分配给每个值。例如，如果我有id:"42":["02022016","02032016"]，我想为这两个值提供类名，而不仅仅是 id 42。我的函数现在只在 id 上给我类，我怎样才能让这个给我每个值的类名？

Answer 1

你需要遍历每个数组：

function giveClass(){
    for(var key in JSONObject){     
        for(var i=0;i<JSONObject[key].length;++i){
            var res2 = document.getElementById(JSONObject[key][i]);   
            res2.className = 'booked';
        }            
    }
}

正如Pointy所说：

您可以将 JSON 直接放入您的 JavaScript 代码中。它没有 必须是一个字符串，您不必显式解析它；只是 将其创建为纯 JavaScript。